1,2-Asymmetric induction in conjugate additions to nitroalkenes
Abstract
Conjugate addition of nucleophiles to the nitroalkenes 8 and 11 followed by in situ ozonolysis resulted in the formation of α-substituted thioesters exhibiting the ‘unexpected’syn relative configuration between the C-3 and newly formed stereogenic centre in all cases but one. The relative stereochemistry in many instances was determined by examination of the 1H NMR coupling constants of the thioesters.